tolong dong buat besok

dek aku jawab nomor 4 aja yah :
a. 3/15 × 90.000
= 18.000
b. 5/15 × 90.000
= 30.000
c. 7/15 × 90.000
=42.000

bantu jawab
1. 2 kw + 70 kg = 270 kg
    125 kg + 350 ons = 169 kg

jadi, 270 kg - 160 kg = 110 kg

2. 12 ton - 10 kw + 25 kg = kg
12 ton = 12 x 1000 = 12000 kg
10 kw = 10 x 100 = 1000 kg
25 kg = 25 x 1 = 25 kg

jadi 12000 -1000 + 25 = 11025 kg

3. 24 pulpen Rp. 48000
     1 pulpen = 48000 : 24 = Rp. 2000
 
    12 penghapus Rp. 18000
     1 penghapus = 18000 : 12 = Rp. 1.500

jadi 2 pulpen + 2 penghapus = (2 x 2000) + (2 x 1.500) = Rp.7000